Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
E03B3/08—Obtaining and confining water by means of wells
E03B3/15—Keeping wells in good condition, e.g. by cleaning, repairing, regenerating; Maintaining or enlarging the capacity of wells or water-bearing layers
G—PHYSICS
G10—MUSICAL INSTRUMENTS; ACOUSTICS
G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
Tastenmusikinstrument, das zwischen einer Akustikklangbetriebsart und einer stummen Betriebsart wechseln kann, sowie darin umfaßtes Stummschaltungssystem